Compilare: user.c: In function ‘sol’: user.c:6:29: warning: variable ‘min’ set but not used [-Wunused-but-set-variable] long long i,u0,p0,u1,p1,min; ^ user.c: At top level: user.c:28:11: warning: return type of ‘main’ is not ‘int’ [-Wmain] long long main() ^ user.c: In function ‘main’: user.c:31:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("trans.in","r",stdin); ^ user.c:32:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("trans.out","w",stdout); ^ user.c:33:10: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld",&n); ^ user.c:36:14: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld%lld",&c[i],&v[i]); ^ user.c:40:10: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld",&q); ^ user.c:43:14: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld%lld",&k,&t); ^